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Investigating the impact of sleep quality on cognitive functions ... frontiersin.org 25 facts
claimThe more pronounced negative effect of poor sleep quality on verbal learning and memory in Tokyo students may be attributed to intense academic pressure, longer study hours, or cultural factors.
measurementThe correlation between PSQI scores and RAVLT (verbal learning and memory) performance is -0.40 in Tokyo and -0.25 in London.
referenceThe study 'Investigating the impact of sleep quality on cognitive functions' utilized a moderation analysis to test whether the relationship between sleep quality (PSQI scores) and cognitive performance (measured by RAVLT, Stroop Test, RPM, and WCST) differs significantly between university students in Tokyo and London.
measurementThe relationship between PSQI score and RAVLT performance was significantly stronger in Tokyo (β = −0.35, p < 0.001) compared to London (β = −0.15, p < 0.05), according to a moderation analysis examining cultural context.
measurementUniversity students in London outperformed university students in Tokyo on cognitive assessments, including the RAVLT (56.6 vs 53.8), Stroop Test (78.4 vs 73.2), RPM (28.7 vs 27.5), and WCST (54.7 vs 50.1).
imageThe study comparing Tokyo and London students found the following Pearson correlation coefficients (r) between PSQI scores and cognitive measures: RAVLT (Tokyo: -0.40, London: -0.25), Stroop Test (Tokyo: -0.35, London: -0.20), RPM (Tokyo: -0.30, London: -0.15), and WCST (Tokyo: -0.42, London: -0.28).
claimThe impact of sleep quality on verbal learning and memory, as measured by the Rey Auditory Verbal Learning Test (RAVLT), is more pronounced in the cultural context of Tokyo compared to London.
measurementA moderation analysis comparing Tokyo and London showed that the relationship between Pittsburgh Sleep Quality Index (PSQI) scores and Rey Auditory Verbal Learning Test (RAVLT) performance was significantly stronger in Tokyo (β = -0.35, p < 0.001) than in London (β = -0.15, p < 0.05).
claimThe study found that the relationship between sleep quality and verbal learning and memory was stronger in Tokyo than in London, a finding described as novel in the literature.
measurementIn a moderation analysis of university students in Tokyo and London, the relationship between sleep quality (measured by PSQI) and RAVLT performance showed a standardized regression coefficient (β) of -0.35 (p < 0.001), indicating that poorer sleep quality is associated with lower verbal learning and memory scores across both cities.
measurementThe interaction between Pittsburgh Sleep Quality Index (PSQI) scores and city location significantly affects Rey Auditory Verbal Learning Test (RAVLT) performance (β = −0.20, p = 0.03), indicating the relationship between sleep quality and verbal memory differs between Tokyo and London.
claimThe study found a more pronounced negative relationship between sleep quality and Rey Auditory Verbal Learning Test (RAVLT) performance in Tokyo compared to London, suggesting that cultural factors may modulate the impact of sleep on memory consolidation.
claimIn a study comparing university students in Tokyo and London, the impact of sleep quality (measured by PSQI scores) on verbal learning and memory (measured by the RAVLT) is more pronounced in the cultural context of Tokyo compared to London.
claimInsufficient or disrupted sleep impairs the brain's ability to encode, store, and retrieve verbal information, as evidenced by negative correlations between sleep quality and Rey Auditory Verbal Learning Test (RAVLT) performance in Tokyo and London students.
claimPoor sleep quality has a stronger negative impact on Rey Auditory Verbal Learning Test (RAVLT) performance in Tokyo compared to London, as indicated by a negative coefficient (β = −0.20).
measurementIn a moderation analysis of university students in Tokyo and London, the interaction term (PSQI x City) for the RAVLT cognitive measure was β = -0.20 (SE = 0.09, t = -2.22, p = 0.03).
measurementIn a moderation analysis of university students in Tokyo and London, the effect of city on RAVLT performance showed a standardized regression coefficient (β) of 0.20 (p = 0.04), indicating that students in London score higher on the RAVLT compared to students in Tokyo, regardless of their sleep quality.
measurementThere are negative correlations between sleep quality and performance on the Rey Auditory Verbal Learning Test (RAVLT) among university students in both Tokyo and London.
claimThe Rey Auditory Verbal Learning Test (RAVLT) word lists were adapted for students in Tokyo to include culturally relevant items: Sakura (Cherry Blossom), Fuji (Mount Fuji), Sushi, Ramen, Temple, Shrine, Manga, Anime, Geisha, Kimono, Bullet Train, Subway, Karaoke, Robot, and Bonsai.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and RAVLT performance is −0.40 (p < 0.001) for students in Tokyo and −0.25 (p < 0.01) for students in London.
measurementIn a moderation analysis of university students in Tokyo and London, the interaction between sleep quality (PSQI) and city on RAVLT performance showed a standardized regression coefficient (β) of -0.20 (p = 0.03), suggesting the relationship between sleep quality and verbal learning and memory is significantly different between the two cities.
claimPoor sleep quality has a stronger negative impact on Rey Auditory Verbal Learning Test (RAVLT) performance in Tokyo students compared to London students.
measurementUniversity students in Tokyo scored lower on the Rey Auditory Verbal Learning Test (RAVLT) with a mean of 53.8 (SD = 8.0) compared to university students in London, who scored a mean of 56.6 (SD = 8.8).
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Rey Auditory Verbal Learning Test (RAVLT) performance is −0.40 in Tokyo and −0.25 in London.
claimA study investigating university students in Tokyo, Japan, and London, UK, found significant negative associations between sleep quality (measured by the Pittsburgh Sleep Quality Index) and cognitive performance across domains including verbal learning and memory (RAVLT), attention and executive function (Stroop Test), non-verbal reasoning (RPM), and cognitive flexibility (WCST).